If you decide to go with the Grant, take a look at TC tubes for the 6DJ8's. They have a great selection of the early 1960's Amprex non Aframe tubes. The ones with the large Halo getter have a bit more detail than the one's with the small Halo getter. They also have some Amprex from 1958 with D getters. I haven't tried one but I hear that they are supposed to be very good.
I have bought many tubes from TC. They are honest, reliable and they won't sell you any bad tubes. They are a young couple that sell from their home. I usually drop by to pick up the tubes.